Pulse Amplitude Modulation
Pulse Amplitude Modulation (PAM) is a modulation technique where the amplitude of a series of regularly spaced pulses is varied in proportion to the instantaneous amplitude of a message signal. It is a form of analog pulse modulation used in digital communication systems to encode analog information into a digital format. PAM serves as a foundational step in more complex modulation schemes like Pulse Code Modulation (PCM) and is commonly applied in applications such as Ethernet and digital telephony.
Developers should learn PAM when working on digital signal processing, telecommunications, or embedded systems that involve analog-to-digital conversion, as it provides a straightforward method for sampling analog signals. It is particularly useful in scenarios requiring efficient bandwidth usage or in the initial stages of signal encoding for transmission over digital channels, such as in audio processing or data communication protocols.